JP3687006B2 - Flash type sprinkler head - Google Patents

Description

[0001]
[Industrial application fields]
The present invention, the deflector in operation is relates to flash Supurinkurahe' de spraying water descends to a predetermined position.
[0002]
[Prior art]
An example of a conventional flash type sprinkler head is disclosed in Japanese Utility Model Publication No. 5-38758. This device has a water outlet for discharging pressure water at the center of the head body, a cylindrical frame is screwed onto the collar of the head body, and the cap is pressed against the water outlet to seal the pressure water. A thermal decomposition part and a deflector mounted on the lower end of a guide rod with a stopper ring attached to the upper part are provided in a cylindrical frame. In particular, an annular stopper ring is provided with a spring-like tongue piece. The arm guide is always urged downward.
[0003]
And when a fire occurs, the soluble alloy provided in the thermal decomposition part melts, the thermal decomposition part decomposes | disassembles, and falls outside from the long hole provided in the deflector. As a result, the cap and arm guide fall due to their own weight and the pressure of the fire extinguishing water, and at the same time, the stopper ring also falls and sits on the bottom of the cylindrical frame, so that the deflector connected to the stopper ring by the guide rod also descends, The cap sits on this deflector. As a result, the water outlet is opened, and the fire extinguishing water is sprayed from the water outlet of the deflector through the water outlet.
[0004]
[Problems to be solved by the invention]
The flash-type sprinkler head as described above is highly reliable and has been well received because of its reliable operation during a fire.
By the way, in such a flash-type sprinkler head, the lower end of the guide rod is fixed to the deflector by welding or other means, and then a stopper ring is inserted into the cylindrical frame from the upper opening of the cylindrical frame (the cylindrical frame). It is necessary to insert a guide rod fixed to the deflector through a long hole provided in the bottom of the cylindrical frame and attach a stopper ring to the upper end of the guide rod in the cylindrical frame. For this reason, a special jig or the like is used, but mounting the stopper ring to the upper end portion of the guide rod is extremely troublesome and requires a lot of man-hours. If the outer diameter of the deflector is made smaller than the slot at the bottom of the frame, the deflector and stopper ring can be inserted from the top opening of the frame with the guide rod connected. This is not preferable because of the problem of deterioration.
[0005]
In addition, since the stopper ring is made of a very thin spring material, if high-pressure fire extinguishing water is discharged from the outlet at the time of water discharge, there is a risk that a large force will be applied to the stopper ring and it will be deformed, preventing sufficient water spraying. There is.
[0006]
The present invention has been made to solve the above problems, obtained deflector, easy to assemble the deflector assembly comprising a guide rod and the stopper ring, and a flash Supurinkurahe' de having a large stopper ring stiffness It is for the purpose.
[0007]
[Means for Solving the Problems]
The present invention is configured as follows in a flash-type sprinkler head including a deflector assembly in which a plurality of guide rods are erected on a deflector and a stopper ring is attached to the upper portion of the guide rod.
(1) The stopper ring is provided with a notch that is formed in an arc shape on the center side corresponding to the guide rod and opens to the outer edge or the inner edge, and a fitting groove is provided on the upper part of the guide rod so that the elasticity of the guide rod Is used to fit the notch portion of the stopper ring into the fitting groove of the guide rod.
Further, the (1) the radius of a circle connecting the centers of the moth Idoroddo respect to the radius of a circle connecting the centers of the semicircular portion of the notch portion of the stopper ring, notches if subordinates are open to the outer edge Is small, and when it opens to the inner edge, it is formed large.
[0008]
( 2 ) Further, in the flash sprinkler heads of the above (1) and (2) , the stopper ring is provided with a bent portion for increasing the thickness in the height direction.
( 3 ) Further, in the flash sprinkler head of ( 2 ) above, the bent portion is formed by bending the inner peripheral portion of the stopper ring upward to increase the mechanical strength.
( 4 ) Further, in the flash sprinkler heads of the above (1) and (2) , a plurality of vertical grooves are provided in the lower part of the guide rod or the mounting hole of the guide rod of the deflector.
[0010]
[Action]
(1) A guide rod erected on the deflector is inserted into the cylindrical frame from an opening provided at the bottom of the cylindrical frame, and a stopper ring is inserted into the cylindrical frame by being inclined from the upper opening of the cylindrical frame, The upper notch is fitted into the fitting groove of the corresponding guide rod, and then the lower notch is raised along the corresponding guide rod so that the stopper ring is almost horizontal. Then, the notch is fitted into the fitting groove of the guide rod within the cylindrical frame using its elasticity.
[0011]
(2) The stopper ring notch is formed by forming one of the radius of the circle connecting the center of the guide rod and the radius of the circle connecting the center of the semicircular portion of the notch of the stopper ring larger than the other. When the fitting groove of the guide rod is fitted to the portion, elasticity can be imparted to the guide rod.
(3) The bent portion is provided in the stopper ring to increase the thickness in the height direction, thereby increasing the rigidity, and there is no possibility that the stopper ring will be deformed even if high-pressure fire extinguishing water is discharged during water discharge.
[0012]
(4) Since a plurality of vertical grooves are provided in the lower part of the guide rod or in the guide rod mounting hole of the deflector, the guide rod can be easily and reliably inserted by press-fitting the lower part of the guide rod into the guide rod mounting hole of the deflector. Can be attached to the deflector.
[0013]
【Example】
1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a side view of FIG. 1 partially showing a cross section, and FIG. 3 is an exploded perspective view of FIG.
In the figure, reference numeral 1 denotes a head main body, a screw portion 2 connected to a water supply pipe, a flange portion 3 integrally provided with the screw portion 2 at a lower portion thereof, and a central portion of the screw portion 2 and the flange portion 3. It consists of a water outlet 5 provided through and a valve seat 6 provided at the lower end of the water outlet 5.
[0014]
A cylindrical frame 10 is shown in detail in FIG. The cylindrical frame 10 is formed in a substantially cylindrical shape, and has an external thread 11 that is screwed into the female thread 4 of the head main body 1 at the top, and an arm of a link mechanism, which will be described later, is locked at a substantially central part of the side wall. Slits 12a and 12b are provided, and bottom plates 13a and 13b having a diameter smaller than that of the inner wall are provided at the lower end portion so as to form a substantially small bowl-shaped opening 14. Reference numerals 15a, 15b, and 15c are guide holes provided in the bottom plates 13a and 13b to open the opening 14 to guide a guide rod described later, and 16 is a step provided on the outer periphery of the lower end.
[0015]
Reference numeral 20 denotes a valve body having a substantially convex cross section that closes the water outlet 5 of the head body 1. A protruding portion 21 is provided at the center of the lower surface, and a caulking piece 22 is provided concentrically with the protruding portion 21. Has been. A packing 23 covers the upper part of the valve body 20. In addition, the valve body 20 is formed larger than the short axis side of the opening part of the deflector mentioned later.
Reference numeral 25 denotes an arm guide, which is formed in a U-shape by a rectangular top plate 26 and side walls 27a and 27b bent downward from the edge on the long side, and a hole 28 provided in the top plate 26. The caulking piece 22 of the valve body 20 is fitted and caulked, and both are integrally coupled. The arm guide 25 may be provided with legs that hang from the four corners of the top plate 26 in place of the side plates 27a and 27b.
[0016]
Reference numeral 30 denotes a balancer inserted between the side walls 27a and 27b of the arm guide 25, and leg portions 32a, 32b, 32c and 32d formed by bending downward from the rectangular top plate 31 and its long side edge. And the inverted triangular side walls 33a and 33b formed between the leg portions 32a to 32d, respectively, and the concave portion 34 provided in the central portion of the top plate 31 abuts against the protruding portion 21 of the valve body 20. . The balancer 30 is not limited to the above structure, and can be appropriately changed, for example, by providing plate-like side walls instead of the leg portions 32a to 32d and the inverted triangular side walls 33a and 33b.
[0017]
Reference numeral 40 denotes a link mechanism inserted between the side walls 27a and 27b of the arm guide 25, and a pair of arms 41a and 41b arranged opposite to each other, the upper part being bent outward and having a locking part 42 at the tip. Both end portions are formed in a bifurcated shape and bent obliquely downward, and the bifurcated portions are loosely fitted to the arms 41a and 41b to be engaged with the upper surface of the stepped portion 43, and the arm support plate 45 The mounted cylinder 46, for example, a ring-shaped fusible alloy 47 made of compression solder and inserted into the cylinder 46, and a disk-shaped piston 49 at the substantially central portion, and screws at the upper and lower end portions The piston column 48 provided in the portions 50 and 51 and both ends are formed in a bifurcated manner, and the screw portion 50 of the piston column 48 is screwed into the screw hole 53 provided in the central portion, and the bifurcated portion is formed in the arms 41a and 41b. Freely fitted, shoulder 44 Abuts becomes Toka link retainer plate 52 to the lower surface, the lower portion of the piston column 48 protrudes holes 46a provided in the cylinder 46 and the arm supporting plate 45, and is loosely fitted to 45a downward. Any other link mechanism 40 may be used as long as it has a structure in which the valve body 20 is normally pressed against the valve seat 6 of the head main body 1 and is disassembled by the occurrence of a fire.
[0018]
Reference numeral 60 denotes a deflector assembly including a deflector 61, guide rods 70a, 70b, and 70c and a stopper ring 80, and details thereof are shown in FIGS. As shown in FIG. 5, the deflector 61 is formed by bending the outer periphery of a disk upward to form a plurality of blades 62. The bottom 63 is provided with a substantially oval opening 64. The long axis side of 64 is formed approximately equal to or slightly longer than the length of the top plate 26 of the arm guide 25, and the short axis side is formed slightly longer than the width of the top plate 26. 65a, 65b, 65c in the mounting hole below the guide rod provided on the bottom 63, the radius of a circle connecting the centers of the mounting holes 65a~65c is chosen to r _1. The outer diameter of the deflector 61 is formed to be approximately the same as the outer diameter of the frame 10.
[0019]
As shown in FIG. 6, the guide rods 70 a to 70 c have an outer diameter head 72 that is substantially equal to or slightly smaller than the inner diameter of the mounting holes 65 a to 65 c provided in the bottom of the deflector 61, and the outer diameter of the head 72. And a base 73 having a diameter larger than the inner diameter of the mounting holes 65a to 65c of the deflector 61. The fitting between the main body 71 and the head 72 is smaller in diameter than the main body 71. A mating groove 74 is provided. Note that the width of the fitting groove 74 is substantially equal to or slightly wider than the thickness of a stopper ring described later.
Reference numeral 75 denotes a plurality of vertical grooves provided on the outer periphery of the lower portion of the main body 71 continuously to the upper surface of the base 73, and is formed by, for example, knurling. It is formed larger than the inner diameter.
[0020]
The stopper ring 80 is formed of a thin spring material, and its outer diameter is slightly smaller than the inner diameter of the cylindrical frame 10 and the inner diameters of the bottom plates 13a and 13b provided at the lower end of the cylindrical frame 10 as shown in FIG. The inner diameter is slightly larger than the outer diameter of the valve body 20. 81a and 81b are tongue pieces provided on the outer periphery and imparted with elasticity; 82a, 82b and 82c are notches provided corresponding to the guide rods 70a, 70b and 70c provided upright on the deflector 61; The part side is formed in a substantially semicircular shape, and is open to the outer edge.
[0021]
The inner diameters of the semicircular portions of the cutout portions 82a to 82c are substantially equal to the outer diameter of the fitting groove 74 of the guide rods 70a to 70c, and the radius of the circle connecting the centers of the semicircular portions. r ₂ is slightly larger than the radius r _{1 of the} circle connecting the centers of the mounting holes 65a to 65c provided in the deflector 61, and therefore connecting the centers of the guide rods 70a to 70c, and is selected so that r ₁ <r _2. Yes. Reference numeral 83 denotes a bent portion formed by bending the inner edge portion upward. In addition, 85 is a protective cover of the link mechanism 40 that also serves as a heat receiving plate, and 86 is a heat receiving plate having a screw portion 87 at the center.
[0022]
Next, an example of the assembly order of the present embodiment including the above-described parts will be described. The link mechanism 40 is assumed to be assembled in advance. First, the guide rods 70a to 70c are inserted into the mounting holes 65a to 65c from below the deflector 61 from the head 72, respectively, and the portion of the vertical groove 75 is press-fitted into the mounting holes 65a to 65c and fixed. In this case, instead of providing the longitudinal grooves 75 in the guide rods 70a to 70c, longitudinal grooves may be provided on the inner walls of the mounting holes 65a to 65c of the deflector 61.
[0023]
Next, the side walls 27 a and 27 b of the arm guide 25 to which the valve body 20 is attached are inserted into the opening 64 from the upper surface of the deflector 61, and the valve body 20 is seated on the bottom 63 of the deflector 61. The guide rods 70 a to 70 c fixed to the deflector 61 are inserted into the cylindrical frame 10 along the guide holes 15 a to 15 c of the cylindrical frame 10, and bent into the cylindrical frame 10 from the upper opening of the cylindrical frame 10. The stopper ring 80 is inserted with the portion 83 facing upward and the notched portion 82a inclined, for example, and the other notched portions 82b and 82c are fitted into the fitting grooves 74 of the guide rods 70b and 70c. Match. The state at this time is shown in FIG.
[0024]
Next, if the notch 82a of the stopper ring 80 is raised along the guide rod 70a, the notch 82a is fitted into the fitting groove 74 of the guide rod 70a, and the stopper ring 80 becomes substantially horizontal. 9, the stopper ring 80 is mounted on the guide rods 70 a to 70 c in the cylindrical frame 10 by the elasticity of the guide rods 70 a to 70 c, and includes a deflector assembly including the deflector 61, the guide rods 70 a to 70 c and the stopper ring 80. Assembly is complete. When assembling the deflector assembly, the stopper ring 80 is mounted on the guide rods 70a to 70c by utilizing its elasticity, so that a special jig or the like is not required, and the stopper ring 80 is easily and reliably mounted at a predetermined position. Can do.
[0025]
Next, the screw portion 11 of the cylindrical frame 10 is loosely screwed into the female screw 4 of the head main body 1, the balancer 30 is inserted between the side walls 27a and 27b of the arm guide 25, and then the link mechanism 40 is inserted to The top portions of 41a and 41b are brought into contact with the balancer 30, and the locking portions 42 are locked with the slits 12a and 12b of the cylindrical frame 10, respectively, so that the cylindrical frame 10 is firmly screwed into the head body 1 and fixed.
[0026]
At this time, the arms 41 a and 41 b receive a rotational force that is directed outward with the tops of the arms 41 a and 41 b as fulcrums, and this rotational force is blocked by the arm support plate 45. Further, the upper end portion of the blade 62 of the deflector 61 is in contact with the step portion 16 of the cylindrical frame 10, and the side walls 27 a and 27 b of the arm guide 25 protrude downward along the edge portion of the opening 64 of the deflector 61. .
Finally, a hole provided in the central portion of the protective cover 85 is fitted into the screw portion 51 of the piston column 48 of the link mechanism 40, and the screw portion 87 of the heat receiving plate 86 is screwed into the screw portion 51 of the piston column 48 to be fixed. Thus, the assembly of the flash sprinkler head according to the present invention is completed.
[0027]
The flash-type sprinkler head configured as described above is inserted from a hole provided in the ceiling, and is attached to the ceiling surface by screwing the screw portion 2 into a water supply pipe installed on the back of the ceiling, and part of the head is attached to the ceiling. Exposed from. And the hole of a ceiling is obstruct | occluded with a sealing plate.
[0028]
When a fire occurs, the heat receiving plate 86 and the protective cover 85 are heated by the hot air flow, and the fusible alloy 47 is heated and melted by the heat flow and the hot air flowing from between the protective cover 85 and the deflector 61. A part flows out of the cylinder 46. As a result, the cylinder 46 and the arm support plate 45 are raised, and both the arms 41a and 41b rotate outwardly with their tops as fulcrums, so that the link mechanism 40 is disassembled, and the link mechanism 40 and the balancer 30 are It falls outside from the openings 14 and 63 of the deflector 61.
[0029]
At the same time, the side wall 27a, 27b of the arm guide 25 falls along the edge of the opening 64 provided in the bottom 63 of the deflector 61 due to its own weight and the pressure of the fire extinguishing water, and the valve body 20 is seated on the bottom 63 of the deflector 61. Then, the opening 64 of the deflector 61 is closed. Thereby, the deflector 61 also falls, and the stopper ring 80 is seated on the bottom plates 13a and 13b of the cylindrical frame 10 and stopped. The state at this time is shown in FIG.
Fire extinguishing water spouts out of the water outlet 5 opened by the fall of the valve body 20, hits the deflector 61 and is sprinkled to extinguish the fire.
[0030]
In the above description, the radius r ₂ of a circle connecting the centers of the semicircular portion of the notch 82a~82c of the stopper ring 80, slightly larger than the radius r ₁ of the circle connecting the centers of the guide rods 70a to 70c, Although the case where r ₁ <r ₂ is formed is shown, on the contrary, for example, only the notch 82a or all of the notches 82a to 82c are opened to the inner edge instead of the outer edge. ₁ > r ₂ may be formed. In short, the notches 82a to 82c of the stopper ring 80 may be fitted into the fitting groove 74 using the elasticity of the guide rods 70a to 70c.
[0031]
【The invention's effect】
As is clear from the above description, the following effects can be obtained according to the present invention.
(1) The stopper ring is provided with a notch that is formed in an arc shape on the center side corresponding to the guide rod and opens to the periphery, and the radius of the circle connecting the center of the guide rod is set to the notch of the stopper ring. provided for the radius of a circle connecting the centers of the semicircular portion, smaller when the outer edge to the opening notch, the rewritable formed larger if opened to the inner edge, a groove on the top of the guide rod Since the notch of the stopper ring is fitted in the fitting groove of the guide rod using the elasticity of the guide rod, the stopper ring can be easily attached to the guide rod without the need for special jigs. In particular, since it can be attached to the guide rod only by moving the stopper ring up and down in a narrow space in the cylindrical frame, the working efficiency can be remarkably improved. In addition, when fitting the notch part of the stopper ring into the fitting groove of the guide rod, the guide rod is made elastic so that the notch part can be easily and surely fitted into the fitting groove. I can .
[0033]
( 2 ) Since the bent part is provided in the stopper ring to increase the thickness in the height direction, the mechanical strength increases, there is no risk of deformation even when high-pressure fire extinguishing water falls, and water spraying is always normal. can do.
[0034]
( 3 ) Since the bent portion is formed by bending the inner peripheral portion of the stopper ring upward, it can be smoothly inserted without being disturbed when the arm guide or the like is accommodated in the cylindrical frame.
[0035]
( 4 ) Since the vertical groove is provided in the lower part of the guide rod or the mounting hole of the guide rod of the deflector, the guide rod can be attached to the deflector by press fitting. For this reason, not only the work becomes easy, but also the guide rod can be securely attached to the deflector.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.
FIG. 2 is a side view of FIG. 1 partially shown in cross section.
FIG. 3 is an exploded perspective view of FIG. 1;
4A and 4B show the cylindrical frame of FIG. 1, in which FIG. 4A is a plan view, and FIG.
FIG. 5 is a plan view of the deflector of FIG. 1;
6 is a front view of the guide rod of FIG. 1. FIG.
7A and 7B show the stopper ring of FIG. 1, in which FIG. 7A is a plan view, and FIG.
FIG. 8 is an explanatory view showing an example of a method of assembling the deflector assembly.
FIG. 9 is an explanatory view showing an example of a method of assembling the deflector assembly.
FIG. 10 is an operation explanatory diagram of the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Head main body 2 Thread part 3 Collar part 4 Female thread 5 Water discharge port 10 Cylindrical frame 11 Male thread 12a, 12b Slit 13a, 13b Bottom plate 14 Opening part 20 Valve body 23 Packing 25 Arm guide 30 Balancer 40 Link mechanism 60 Deflector assembly 61 Deflector 62 Blade 63 Bottom 64 Opening 65a, 65b, 65c Guide rod mounting holes 70a, 70b, 70c Guide rod 71 Main body 74 Fitting groove 75 Vertical groove 80 Stopper ring 82a, 82b, 82c Notch 83 Bending part

Claims (4)

In a flash type sprinkler head having a deflector assembly in which a plurality of guide rods are erected on a deflector and a stopper ring is attached to the upper portion of the guide rods,
The stopper ring is provided with a notch that is formed in a semicircular shape on the center side corresponding to the guide rod and opens to the outer edge or inner edge, and the radius of the circle connecting the center of the guide rod is set to the notch of the stopper ring. The radius of the circle connecting the center of the semicircular part of the notch is small when the notch opens to the outer edge and large when the notch opens to the inner edge, and is fitted to the upper part of the guide rod. A flush sprinkler head characterized in that a mating groove is provided and the notch portion of the stopper ring is fitted into the fitting groove of the guide rod using the elasticity of the guide rod.   2. The flash sprinkler head according to claim 1, wherein the stopper ring is provided with a bent portion for increasing the thickness in the height direction.   3. The flash sprinkler head according to claim 2, wherein the bent portion is formed by bending the inner peripheral portion of the stopper ring upward to increase the mechanical strength.   2. The flash sprinkler head according to claim 1, wherein a plurality of vertical grooves are provided in a mounting hole of a guide rod of the lower part of the guide rod or the deflector.

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